Density
1 Which is heaviest, 1 kilogram of gold or 1 kilogram of feathers?
2 Which is bigger, 1 kilogram of gold or 1 kilogram of feather?
3 Basically, density is how compact an object is.
4 Density is the mass of an object divided by its volume.
5 Volume is the amount of space that something takes up.
6 Scales measure the pull of gravity on an object.
7 Balances compare the mass of an object to a known mass, so they read the same on the Earth and Moon.
8 Calculate by D = M/V